GCELL := GEO: ::  TUBEZ 4 5
  R+ VOID  Z- VOID Z+ REFL 
  RADIUS   0.0 60. 70. 100. 120.
  MESHZ   -20.
          0.0        
          VAR.G.HC1  
          VAR.G.HC2  
          VAR.G.HC3
          VAR.G.HC4 
  MIX 
   11  9    11  11
   1   9     5  11    
   2   9     6  11    
   3   9     7  11    
   4   9     8  11    
  SPLITR 5 2 5 2
  SPLITZ 2 2 2 2 2
 ;
